Ab initio structure determination of [Eu₅(C₂H₄O₂)₆(CH₃CO₂)₃] _n by X-ray powder diffraction

Abstract

The compound [Eu 5 (C 2 H 4 O 2 ) 6 (CH 3 CO 2 ) 3 ] n was synthesized by dissolving acetate europium salt in ethylene glycol solvent and heating under reflux for a short time. Its structure was solved ab initio from synchrotron powder diffraction data using optimization methods in direct space. The compound has a very large unit-cell volume of 23679 Å 3 and the highest centred cubic symmetry space group, Ia 3 3d (No. 230). The porous metal-organic framework structure is similar to those usually observed in zeolites, with pores volumes of 82 Å 3 , which is of potential interest for gas storage.

Tin and Lead Alkoxides of Ethylene Glycol and Glycerol and their Decomposition to Oxide Materials

“…Several examples of the formation of alkoxides from metal acetate precursors and EG were described, e.g. Zn 2 (OAc) 3 (C 2 H 5 O 2 ), Zn(C 2 H 4 O 2 ), Cu 3 (OAc) 2 (C 2 H 4 O 2 ) 2 , Cu(C 2 H 4 O 2 ), and Eu 5 (OAc) 3 (C 2 H 4 O 2 ) 6 …”

“…Zn 2 (OAc) 3 (C 2 H 5 O 2 ), [24] Zn(C 2 H 4 O 2 ), [12] Cu 3 (OAc) 2 (C 2 H 4 O 2 ) 2 , [10] Cu(C 2 H 4 O 2 ), [10] and Eu 5 (OAc) 3 (C 2 H 4 O 2 ) 6 . [25] It is well-established that tin alkoxides can dimerize and further oligomerize via intermolecular O→Sn coordination. For example, tin alkoxides of the type Sn(OCH 2 CH 2 ) 2 NR) (R = Me, tBu) show dimerization with formation of Sn 2 O 2 rings.…”